Which of the following is a consequence of failing to monitor bridge conditions regularly?

The selection of increased risk of unexpected structural issues as the correct response underscores the critical importance of regular monitoring of bridge conditions. Regular inspections serve as a key measure for identifying and assessing potential deterioration or damage that may not be immediately visible. By failing to monitor bridge conditions, there is a significant chance that small issues—such as cracks, corrosion, or material fatigue—will go unnoticed and subsequently evolve into more severe structural problems. These unforeseen issues can lead to catastrophic failures, safety hazards, and costly emergency repairs, all of which could have been mitigated through routine inspections.

The other options highlight scenarios that are unlikely, given the absence of regular monitoring. For instance, improved traffic flow and lower maintenance costs are typically the results of a well-maintained structure, which can only be achieved through consistent oversight. Early identification of maintenance needs, on the other hand, is directly thwarted by a lack of regular inspections—meaning that without monitoring, maintenance needs may be recognized too late to avoid significant risks or expenses. Thus, the importance of proactive inspection practices becomes clear in preventing the escalation of structural issues.